Vitamin D3 and collagen are two everyday staples that often end up in the same morning routine. Vitamin D3 is the "sunshine vitamin" in a small softgel. Collagen is the scoop people stir into coffee for skin, nails and joints. So can you take vitamin D3 with collagen?
Short answer: yes. For most healthy adults there's no known reason to keep them apart, and breakfast is a great time for both. Here's what each one does, what the research says, where evidence on the combination is limited, and a simple daily routine.
The short version
| Question | What we know |
|---|---|
| Can you take them together? | Yes. We didn't find any reported interaction between vitamin D3 and collagen peptides |
| Has the combination been studied? | Not that we could find. Evidence on the pairing is limited, but each has its own research |
| Do they do the same job? | No. Vitamin D helps your body use calcium and supports muscle function. Collagen peptides are studied for skin, nails and training |
| Vitamin D3 amount | One 2,000 IU softgel a day, under the 4,000 IU daily upper limit for adults |
| Collagen amount | Two scoops, 20 g of collagen, in 8 to 10 oz of a drink |
| Best time | With a meal that contains some fat, such as breakfast |
Why people take vitamin D3 and collagen together
They support your body in different ways:
- Vitamin D3 is a fat-soluble vitamin your skin makes from sunlight. Many people spend most of the day indoors, and the body makes less in winter, so a softgel is an easy way to cover your intake.
- Collagen is the main structural protein in your skin, tendons and connective tissue. Collagen peptides are a broken-down form that mixes easily into a drink.
Since one is a softgel and the other is a scoop, they slot into the same breakfast without any effort.
What vitamin D3 does
Vitamin D helps your body absorb and use calcium, which is why it's central to healthy bones. The Institute of Medicine report on dietary reference intakes for calcium and vitamin D set the recommended intake for most adults at 600 IU a day (800 IU over 70) and the upper limit at 4,000 IU.
Vitamin D also plays a role in muscle. A review of randomized trials found that vitamin D supplementation was linked to a small increase in muscle strength, with the clearest effect in people who started with lower levels and in older adults.
What collagen does
- Skin: A 2021 review pooled 19 randomized trials with 1,125 participants. Hydrolyzed collagen was linked to better skin hydration and elasticity compared with placebo, with about 90 days of use as a common benchmark.
- Skin elasticity at 8 weeks: In a placebo-controlled trial, women aged 35 to 55 who took 2.5 g or 5 g of collagen peptides a day had better skin elasticity after 8 weeks.
- Muscle with training: In a trial of older men doing resistance training, collagen peptides were linked to greater gains in fat-free mass and strength than training with a placebo.
- Bone: In a 12-month placebo-controlled trial in 131 postmenopausal women, 5 g of specific collagen peptides a day was linked to higher bone mineral density than placebo.
What about taking both?
Here's the honest part. We didn't find any published trials that tested vitamin D3 and collagen peptides together, so we can't say whether the combination adds up to more than each one alone. Evidence on the pairing itself is limited.
What we can say:
- Vitamin D supports normal calcium use and muscle function (Ross et al., 2011; Beaudart et al., 2014).
- Collagen peptides have their own trials for skin, training and bone (de Miranda et al., 2021; König et al., 2018).
- They work in different ways, and we didn't find any reports of problems when the two are taken together.
So take each for its own research, and enjoy the convenience of one routine.
Why breakfast works so well
Vitamin D is fat-soluble, so what you eat with it matters:
- In one study, people who switched to taking vitamin D with their largest meal saw better absorption and higher blood levels.
- In another trial, taking vitamin D3 with a meal that contained fat led to a higher rise in blood vitamin D3 than a fat-free meal.
Our chocolate collagen stirs into milk, coffee with cream, or a smoothie with nut butter, so it naturally pairs with a bit of fat. Take your vitamin D3 softgel with the same meal and you're done.
How to take vitamin D3 and collagen together
- Make your drink. Mix two scoops of Grass-Fed Collagen Peptides Powder (Chocolate), 20 g of collagen, into 8 to 10 oz of coffee, milk or a smoothie. Try our collagen coffee recipe.
- Take one softgel. Our Vitamin D3 2,000 IU is cholecalciferol, the same form your skin makes from sunlight, in one small softgel a day.
- Eat a real breakfast. Something with a little fat, such as eggs, yogurt or avocado toast, supports vitamin D absorption.
- Repeat daily. Consistency matters more than the exact time.
For more on timing, see the best time to take vitamin D and the best time to take collagen.
How long until you notice anything?
Neither one is an overnight change. Vitamin D blood levels build up over weeks of daily use. The collagen skin trials measured results at 8 to 12 weeks. Plan on at least three months. See how long vitamin D3 takes to work and how long collagen takes to work.
Watch your total vitamin D
The upper limit for adults is 4,000 IU a day from all supplements (Ross et al., 2011). One 2,000 IU softgel sits well under it. If you also take a multivitamin or a hair, skin and nails formula, check those labels too, since many include vitamin D. See vitamin D3 with a multivitamin.
Is it safe?
Both are well tolerated at label amounts. Our collagen is made from bovine hide, and our vitamin D3 softgel is made with gelatin, so neither is vegetarian. Check with your doctor first if you're pregnant or nursing, have a kidney condition or any medical condition, or take regular medicine, and stick to the amounts on each label.
Frequently asked questions
Can I take vitamin D3 and collagen at the same time?
Yes. Taking them together with breakfast is the simplest routine.
Does collagen help vitamin D absorb?
Not on its own. What helps is eating some fat in the same meal. Mixing collagen into milk or a smoothie with nut butter covers that.
Can I add creatine or magnesium?
Many people do. See creatine with vitamin D3, creatine with collagen and magnesium with vitamin D3.
Is this a good routine after 50?
It's a popular one. Both vitamin D and collagen peptides have been studied in older adults, as shown above. Check with your doctor about the right vitamin D amount for you.
The bottom line
Yes, you can take vitamin D3 with collagen. There's no direct research on the pair, but each has its own studies, they do different jobs, and no interaction has been reported. One 2,000 IU softgel and two scoops of collagen with a breakfast that has some fat is an easy daily habit. Give it three months.
Ready to build your morning routine? Shop Vitamin D3 2,000 IU and Grass-Fed Collagen Peptides.
References
- Ross et al. The 2011 Report on Dietary Reference Intakes for Calcium and Vitamin D from the Institute of Medicine: What Clinicians Need to Know. The Journal of Clinical Endocrinology & Metabolism. 2011. doi:10.1210/jc.2010-2704 (PubMed 21118827)
- Beaudart et al. The Effects of Vitamin D on Skeletal Muscle Strength, Muscle Mass, and Muscle Power: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. The Journal of Clinical Endocrinology & Metabolism. 2014. doi:10.1210/jc.2014-1742 (PubMed 25033068)
- de Miranda et al. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta‐analysis. International Journal of Dermatology. 2021. doi:10.1111/ijd.15518 (PubMed 33742704)
- Proksch et al. Oral Supplementation of Specific Collagen Peptides Has Beneficial Effects on Human Skin Physiology: A Double-Blind, Placebo-Controlled Study. Skin Pharmacology and Physiology. 2013. doi:10.1159/000351376 (PubMed 23949208)
- Zdzieblik et al. Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men: a randomised controlled trial. British Journal of Nutrition. 2015. doi:10.1017/S0007114515002810 (PubMed 26353786)
- König et al. Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Women—A Randomized Controlled Study. Nutrients. 2018. doi:10.3390/nu10010097 (PubMed 29337906)
- Mulligan et al. Taking vitamin D with the largest meal improves absorption and results in higher serum levels of 25-hydroxyvitamin D. Journal of Bone and Mineral Research. 2010. doi:10.1002/jbmr.67 (PubMed 20200983)
- Dawson-Hughes et al. Dietary Fat Increases Vitamin D-3 Absorption. Journal of the Academy of Nutrition and Dietetics. 2015. doi:10.1016/j.jand.2014.09.014 (PubMed 25441954)
Researchers named in this article are cited for their published work only. Not affiliated with Health & Cognition.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
